Fixed #34259 -- Passed called_from_command_line to command subparsers.

django/core/management/base.py

@@ -6,6 +6,7 @@ import argparse
 import os
 import sys
 from argparse import ArgumentParser, HelpFormatter
+from functools import partial
 from io import TextIOBase
 
 import django
@@ -71,6 +72,15 @@ class CommandParser(ArgumentParser):
         else:
             raise CommandError("Error: %s" % message)
 
+    def add_subparsers(self, **kwargs):
+        parser_class = kwargs.get("parser_class", type(self))
+        if issubclass(parser_class, CommandParser):
+            kwargs["parser_class"] = partial(
+                parser_class,
+                called_from_command_line=self.called_from_command_line,
+            )
+        return super().add_subparsers(**kwargs)
+
 
 def handle_default_options(options):
     """

tests/user_commands/management/commands/subparser_vanilla.py

@@ -0,0 +1,13 @@
+import argparse
+
+from django.core.management.base import BaseCommand
+
+
+class Command(BaseCommand):
+    def add_arguments(self, parser):
+        subparsers = parser.add_subparsers(parser_class=argparse.ArgumentParser)
+        parser_foo = subparsers.add_parser("foo")
+        parser_foo.add_argument("bar", type=int)
+
+    def handle(self, *args, **options):
+        pass

tests/user_commands/tests.py

@@ -468,6 +468,30 @@ class CommandRunTests(AdminScriptTestCase):
         self.assertNoOutput(err)
         self.assertEqual(out.strip(), "Set foo")
 
+    def test_subparser_error_formatting(self):
+        self.write_settings("settings.py", apps=["user_commands"])
+        out, err = self.run_manage(["subparser", "foo", "twelve"])
+        self.maxDiff = None
+        self.assertNoOutput(out)
+        err_lines = err.splitlines()
+        self.assertEqual(len(err_lines), 2)
+        self.assertEqual(
+            err_lines[1],
+            "manage.py subparser foo: error: argument bar: invalid int value: 'twelve'",
+        )
+
+    def test_subparser_non_django_error_formatting(self):
+        self.write_settings("settings.py", apps=["user_commands"])
+        out, err = self.run_manage(["subparser_vanilla", "foo", "seven"])
+        self.assertNoOutput(out)
+        err_lines = err.splitlines()
+        self.assertEqual(len(err_lines), 2)
+        self.assertEqual(
+            err_lines[1],
+            "manage.py subparser_vanilla foo: error: argument bar: invalid int value: "
+            "'seven'",
+        )
+
 
 class UtilsTests(SimpleTestCase):
     def test_no_existent_external_program(self):